/* 
 * Copyright (C) 2005-2008 MaNGOS <http://www.mangosproject.org/>
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 */

#ifndef MANGOS_GRIDLOADER_H
#define MANGOS_GRIDLOADER_H

/**
  @class GridLoader
  The GridLoader is working in conjuction with the Grid and responsible
  for loading and unloading object-types (one or more) when objects
  enters a grid.  Unloading is scheduled and might be canceled if
  an interested object re-enters.  GridLoader does not do the actuall
  loading and unloading but implements as a template pattern that
  delicate its loading and unloading for the actualy loader and unloader.
  GridLoader manages the grid (both local and remote).
 */

#include "Platform/Define.h"
#include "Grid.h"
#include "TypeContainerVisitor.h"

template
<
class ACTIVE_OBJECT,
class WORLD_OBJECT_TYPES,
class GRID_OBJECT_TYPES
>
class MANGOS_DLL_DECL GridLoader
{
    public:

        /** Loads the grid
         */
        template<class LOADER>
            void Load(Grid<ACTIVE_OBJECT,WORLD_OBJECT_TYPES, GRID_OBJECT_TYPES> &grid, LOADER &loader)
        {
            grid.LockGrid();
            loader.Load(grid);
            grid.UnlockGrid();
        }

        /** Stop the grid
         */
        template<class STOPER>
            void Stop(Grid<ACTIVE_OBJECT,WORLD_OBJECT_TYPES, GRID_OBJECT_TYPES> &grid, STOPER &stoper)
        {
            grid.LockGrid();
            stoper.Stop(grid);
            grid.UnlockGrid();
        }
        /** Unloads the grid
         */
        template<class UNLOADER>
            void Unload(Grid<ACTIVE_OBJECT,WORLD_OBJECT_TYPES, GRID_OBJECT_TYPES> &grid, UNLOADER &unloader)
        {
            grid.LockGrid();
            unloader.Unload(grid);
            grid.UnlockGrid();
        }
};
#endif
